Motion picture data encrypting method and computer system and mo

Details Motion picture data encrypting method and computer system and mo Motion picture data encrypting method and computer system and mo

1997-10-14

2000-02-01

Swann, Tod R.

Cryptography

Key management

Having particular key generator

380 4, H04N 7167

Patent

active

060211997

ABSTRACT:
Of I, P, and B pictures contained in an MPEG 2 data stream, only the I picture is subjected to encryption such as scramble processing. Scramble rule data used at that time is stored in the lead-in area of an optical disk. A software DVD decoder reads the scramble rule data stored in the lead-in area, and its certification control module descrambles only the I picture. With this processing, the CPU power required for descramble processing can be reduced, and motion picture data can be decoded by the software DVD decoder in real time.

REFERENCES:
patent: 5598276 (1997-01-01), Cookson et al.
patent: 5600721 (1997-02-01), Kitazato
patent: 5621794 (1997-04-01), Matsuda et al.
patent: 5805700 (1998-09-01), Nardone et al.

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